42645297809 has 8 divisors (see below), whose sum is σ = 44595980352. Its totient is φ = 40702660240.

The previous prime is 42645297803. The next prime is 42645297811. The reversal of 42645297809 is 90879254624.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42645297809 - 2⁸ = 42645297553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42645297803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2000399 + ... + 2021604.

It is an arithmetic number, because the mean of its divisors is an integer number (5574497544).

Almost surely, 2^42645297809 is an apocalyptic number.

It is an amenable number.

42645297809 is a deficient number, since it is larger than the sum of its proper divisors (1950682543).

42645297809 is a wasteful number, since it uses less digits than its factorization.

42645297809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022487.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 42645297809 in words is "forty-two billion, six hundred forty-five million, two hundred ninety-seven thousand, eight hundred nine".